Mark said:

Ya know, it's kinda like someone with a mail route telling people that he works for the President of the US. True? Sure. Does the semi-misleading explanation wind up being more trouble than it is worth? I think so.
Mark, no offense, but if you equate someone who writes for a d20 publisher saying "I write for D&D" to an outsider with a postal carrier saying "I work for the President of the U.S.", I think we have more glaring problems in communication. Don't get me wrong -- it's a cute analogy that does a nice job of cutting my point off at the knee if you don't really think about it -- but back when I was trying out for the Mongoose publishing job (in case you were wondering: No), I got to explain to several non-gamers in a row the concept of writing d20/OGL products for a gaming company. They knew what D&D was. It was
far easier to say, "Writing for D&D" and then go into detail about the SRD and Wizards and Mongoose and such only when it became necessary than it was to start out explaining about the d20 SRD and Open Gaming and such.
On the other hand, since they already knew what D&D was, it was easy enough to start out with D&D, rather than using your Tolkien/Conan riffs.
Me: Yeah, so the job I'm applying for involves writing for Mongoose Publishing.
Dad: Do they do D&D?
Me: Well, they do games that are compatible with D&D. It's kind of like--
Dad: Is it like a Honda versus a Toyota?
Me: No, well, not really, see Mongoose puts out Conan and Starship Troopers--
Dad: So you're going to be doing movies?
Me: No, see, Wizards of the Coast publishes D&D, and they've released the core components--
Dad: I thought you said Mongoose did D&D.
Me: Well, actually, I said that Mongoose did games that were compatible with the core components, and were used by a license--
Dad: So, you'd be writing for D&D, then?
Me: Um... yes. Yes, I would.
Dad: That's great, son. Go get 'em.
Don't get me wrong -- I love your Tolkein/Conan riffs. I think that's a great way to approach it, and I think it might cause less tension. Personally, I've also gotten good mileage out of, "Like Choose Your Own Adventures books, only you're with a group, and you all get to slay dragons and save good people from monsters," but I think yours capitalizes well on the current trends. In fact, your riff is, I think preferable to saying "I write for D&D" if you're not sure about the kind of reception you're going to get.
But I just don't buy that saying "I write for D&D" to somebody who isn't a gamer for simplicity's sake is the kind of falsehood you make it out to be. It's not like you're telling someone who doesn't know much about football that you're the quarterback for the Rams.